<!DOCTYPE html>
<title>View transitions: New content is an inline element (ref)</title>
<link rel="help" href="https://www.w3.org/TR/css-view-transitions-1/">
<link rel="author" href="mailto:bokan@chromium.org">
<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />

<style>
:root {
  background-color: rebeccapurple;
  font: 20px/1 Ahem;
}

body { margin: 0; }

.container {
  position: absolute;
  left: 100px;
  width: 400px;
  height: 100px;
  background-color: grey;
}

.container.start {
  top: 100px;
}

.container.end {
  top: 300px;
}

.container.transitioned {
  left: 20px;
  width: 600px;
  transform: translateY(-50px);
}

.inline {
  opacity: 0;
  background-color: coral;
  color: rgba(0, 0, 0, 0);
}

.transitioned .inline {
  opacity: 1;
}

#dummyStartInline {
  position: absolute;
  left: 100px;
  top: 100px;
  width: 600px;
  /* scale transform applied in script below */
  transform-origin: top left;
}

</style>

<div class="container start">
  <span>FILLER FILLER</span>
  <span id="start" class="inline">INLINE INLINE INLINE INLINE</span>
  <p style="margin-top: 50px">START STATE</p>
</div>

<div class="container end transitioned">
  <span>FILLER FILLER</span>
  <span id="end" class="inline">INLINE INLINE INLINE INLINE</span>
  <p>END STATE</p>
</div>

<div id="dummyStartInline" class="transitioned">
  <span style="opacity:0">FILLER FILLER</span>
  <span class="inline">INLINE INLINE INLINE INLINE</span>
</div>
<script>
  let endWidth = document.getElementById('end').getBoundingClientRect().width;
  let startWidth = document.getElementById('start').getBoundingClientRect().width;
  let scale = startWidth / endWidth;
  /* Default UA CSS scales the image pseudos to match the group in the inline
     direction. The block direction scales to retain the image's aspect ratio.
     So have the dummy end line scale to match the start state width and apply
     the same scale to its height. */
  document.getElementById('dummyStartInline').style.transform = `scale(${scale})`;
</script>

